Triple-Play Service Deployment

Chapter 5: Troubleshooting the Premises Wiring
Understanding the Role of the Premises Architecture
The triple-play access network delivery method chosen by the
service provider has great implication with respect to the
performance requirements placed on the customer’s home network
infrastructure. Different methods of triple-play delivery inevitably
require different home networking technologies.
In the FTTH model, the fiber is terminated at the home by an optical
network terminator (ONT) that provides interfaces to serve analog
and digital video over coax, data over Ethernet, and phone service
over twisted pair wiring. Service providers use this model to
provide digital video through quadrature amplitude modulation
(QAM) or Internet protocol television (IPTV) or a combination of
both. For the premises architecture that uses both QAM for
broadcast video and IPTV for on-demand, the IPTV video shares the
coax with the QAM digital video and is typically delivered using
the Multimedia over Coax Alliance (MoCA) standard.
The FTTC and FTTN models offered by many service providers use
VDSL2 or ADSL2+ as the network access technology.These too can
involve a different home networking set-up. The DSLAM in the
central office or remote DSLAM in the neighborhood uses copper
and a DSL technology to connect to the DSL modem or RG. A
range of network technologies is used to reach STBs. In this
situation, digital video is deployed strictly as IPTV because twisted
pair does not have the bandwidth necessary to carry a QAM cable
TV signal. Service providers using xDSL are deploying IPTV using
existing wiring in the home. HPNAv3 is often used in the xDSL
architecture to deliver IPTV and data since it can run on existing
twisted pair telephone lines or coax.Yet others deliver video and data
over MoCA especially if the access is a QAM cable TV technology.
The goal in the home is “no new wires”—re-use existing infrastructure
for the most economical deployment of services. Each
service provider must evaluate which technology can provide the
most advantageous balance between economic and performance
benefits for triple-play services deployed in the home.
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